package me.yobol.blog.exception;

public class UserNameDuplicationException extends Exception {

	private static final long serialVersionUID = 2753026644180385202L;
	private static String msg = "该用户名已存在";
	
	public UserNameDuplicationException(){
		super(msg);
	}
	
	@Override
	public String toString() {
		return msg;
	}

}
